PostgreSQL is an object-relational database which supports spatial/geometry data, hence, there are questions which are on topic here for its own (aren't there? but not sure how big this niche is). PostGIS is a extension to PostgreSQL which adds support for geographic objects, and of course, is also on topic here.
So far we have:
- 6154 question tagged [postgis];
- 2598 questions tagged [postgresql];
- 1806 questions tagged both.
Something, like this:
Because, many questions are pertinent to both subjects it's been a while I have the impression there is (some) confusion when choosing which tags to use, i.e.:
- using both tags when it is only about one product;
- using one tag instead of the other (for example, using [postgresql] when it is (also) about [postgis]. (example).
Specially the second topic listed above, if it really happens it is bad, because it fragments content across the site (generate excessive duplicates).
Like many questions here about tags, we should consider not only how different/equal these products are in the 'real world', but how useful would be to GIS SE to relax (or make it stricter) the strategy to use such tags here.
So, is there anything you think is worth doing about these tags:
- improving guidance on both tag excerpts (when to use one, when to use the other)?
- making them synonyms?
- creating a composite tag (like geotiff-tiff)?
- doing nothing; other suggestions?